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Sequoia <br />404 <br />rN WiA 598 <br />Walnut Creek CA 94598 <br />500 <br />(925)988-9600 <br />Analytical <br />FAX (925) 988-9673 <br />www sNuolalabs <br />Gettler Ryan, hic - Dublin Project Chevron <br />6747 Sierra Court Suite J Project Number Chevron # 9-5775 Reported <br />Dublin CA, 94568 Project Manager Scott Poiston 25 -Jul -00 10 44 <br />Volatile Organic Compounds by EPA Method 8260A - Quality Control <br />Sequoia Analytical - Walnut Creek <br />Reporting Spike Source %REC RPD <br />Analvte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch 0008002 - EPA 5030E [PIT] <br />Blank (OG08002-BLKI) <br />530 <br />500 <br />Ethylbenzene <br />ND <br />20 ue-fl <br />Total Xylenes <br />ND <br />20 <br />1 1,1,2 -Tetrachloroethane <br />ND <br />20 <br />Styrene <br />ND <br />2 0 " <br />Bromoform <br />ND <br />20 <br />Isopropylbenzene <br />ND <br />20 " <br />1,1,2,2 Tetrachloroethane <br />ND <br />20 " <br />Bromobenzene <br />ND <br />20 <br />n-Propylbenzene <br />ND <br />20 " <br />1,2,3-Tnchloropropane <br />ND <br />20 " <br />2-Chlorotoluene <br />ND <br />20 " <br />1,3,5-Tnmethylbenzene <br />ND <br />20 <br />4-Chlorotoluene <br />ND <br />20 " <br />tert-Butylbenzene <br />ND <br />20 " <br />1,2,4-Trimethylbenzene <br />ND <br />2 0 <br />sec-Butvlbenzene <br />ND <br />20 " <br />p-tsopropyltoluene <br />ND <br />20 " <br />1,3 -Dichlorobenzene <br />ND <br />20 <br />1,4 -Dichlorobenzene <br />ND <br />20 " <br />n-Butvlbenzene <br />ND <br />20 " <br />1,2 -Dichlorobenzene <br />ND <br />20 " <br />12-Dibromo-3-chloropropane <br />ND <br />50 " <br />1,2,4-Tnchlorobenzene i <br />ND <br />20 <br />Naphthalene <br />ND <br />10 " <br />Hexachlorobutadiene <br />ND <br />10 " <br />1,2,3-Tnchlorobenzene <br />ND <br />2 0 <br />Prepared & Analyzed 06 -Jul -00 <br />Surrogate Dibromofluoromerhane <br />530 <br />500 <br />106 <br />50-150 <br />Surrogate 12 Dichloroethane-d4 <br />510 <br />500 <br />102 <br />50-150 <br />Surrogate Toluene -d8 <br />500 <br />500 <br />100 <br />50-150 <br />Surrogate 4-Bromofluorobenrene <br />500 <br />500 <br />100 <br />50.150 <br />Sequoia Analytical - Walnut Creek <br />The results in this report apply to the samples analyzed in accordance with the <br />custody document Tiffs analytical report must he reproduced in its <br />.2. <br />Page 19 of 25 <br />